Should the timing chain tensioner also be replaced if you are going to carry out this alteration? I mean if the chain has slacked enough to be hitting the guides then it must have a higher chance of skipping a tooth and causing havoc in the engine. I know they stopped putting the upper guide on models from about 95' due to a larger and more advanced timing chain tensioner. Would this not be wise? Also would it not be better to put the bolts back in after removing the guide so not to leave small holes for oil to accumulate in?